Grounding Issues....I Think
#1
Grounding Issues....I Think
I have a SN95 and recently got in my car and noticed a constant ticking noise coming through the speakers. After researching for a week or so I have only came up with the possibility that it could be a ground issue. The only problem I have is finding the ground cable that goes from the body to the motor mount. Does anyone have a picture of it? Does this sound like the issue?
#2
two things, you may have bad spark plug wires, try replacing them, or a bad alt........when a diode goes bad ac current can backfeed into the system and cause such. First I'd try replacing the wires, my 92 used to make a whiring sound in the speakers when the suppresion core around the wiring was bad
#4
SN95 do have grounding issues. Sorry I do not have diagrams, they are on my other computer. It sounds like to me Mjr46 hit the right area to trouble shoot though Ignition/Alternator.
Grounding issues, you will see in some cases a higher reading on some of your Factory gages. I took my Fluke and verified all of my grounds. It does make a big difference. Over time the conductor to lug corrodes and causes higher resistance. Also the contact between the lug and painted body panel. Our mustangs are getting older and this is often overlooked.
Grounding issues, you will see in some cases a higher reading on some of your Factory gages. I took my Fluke and verified all of my grounds. It does make a big difference. Over time the conductor to lug corrodes and causes higher resistance. Also the contact between the lug and painted body panel. Our mustangs are getting older and this is often overlooked.
#5
A quick way to test a ground is to use a volt/multi-meter to do a voltage drop test.
Tip: try to avoid poking wholes in wires. That just creates a place for moisture to get in and corrode the wire from the inside out over time. It is better to back-probe connections with a small safety pin and touch the meter lead to the safety pin. But if you must poke wholes, seal up the whole with some RTV or better yet some .
Hope that helps.
- Key On, Engine Off
- Set your meter to as close to 15 volts as possible without going under.
- Touch the negative meter lead to the negative battery post
- Touch the positive meter lead to the ground connection/lug/wire you want to test.
Tip: try to avoid poking wholes in wires. That just creates a place for moisture to get in and corrode the wire from the inside out over time. It is better to back-probe connections with a small safety pin and touch the meter lead to the safety pin. But if you must poke wholes, seal up the whole with some RTV or better yet some .
Hope that helps.
Last edited by petrock; 01-13-2013 at 08:04 PM.
#8
Instead of throwing parts at the problem and wasting your time & money, why not diagnose it and fix it right the first time. I gave you very simple to follow instructions on how to find a ground issue. They really aren't that hard to track down and diagnose.
btw, grounding off the water pump won't do anything because the motor is already grounded in at least 2 spots. It also wouldn't provide a very good ground because the ground would go through the pump ->bolts and into the engine block. Again, you'll be wasting your time.
There are no silver bullets for electrical issues. You're going to have to dive in and diagnose it or pay someone to do it for you.
Good luck...
btw, grounding off the water pump won't do anything because the motor is already grounded in at least 2 spots. It also wouldn't provide a very good ground because the ground would go through the pump ->bolts and into the engine block. Again, you'll be wasting your time.
There are no silver bullets for electrical issues. You're going to have to dive in and diagnose it or pay someone to do it for you.
Good luck...
Last edited by petrock; 01-20-2013 at 11:58 PM.